Siren: 2г—7 May 2026

: While in the mountains, the mermaids discover historical evidence linking humans and mermaids, providing vital lore regarding their shared past.

: In gravitational-wave astronomy, "standard sirens" are used to measure cosmic distances. Researchers often compare results between second-generation (2G) and third-generation (3G) detector networks. Siren: 2Г—7

: The New York Sirens (PWHL) statistics or specific match reports, such as their games against the Boston Fleet. : While in the mountains, the mermaids discover

: To protect the mermaid colony from the increased police and federal presence, Ryn remains in town while Helen leads the other mermaids to a remote sanctuary in the mountains. : The New York Sirens (PWHL) statistics or

: The discovery of a body, later identified as Xander’s father (killed in the previous season), brings federal agents to Bristol Cove. This investigation complicates the efforts of Ben, Maddie, and Ryn to keep the mermaids' presence secret.

The episode is a turning point for the season, shifting from the immediate survival of the mermaids to a broader geopolitical and military conflict. It explores themes of (Nicole's deception), ancestral history , and the ethical boundaries of scientific and military pursuit.